Mac: Modify Omnibox to notice when the window loses key, too.

chrome/browser/autocomplete/autocomplete_edit_view_mac.h

Index: chrome/browser/autocomplete/autocomplete_edit_view_mac.h
diff --git a/chrome/browser/autocomplete/autocomplete_edit_view_mac.h b/chrome/browser/autocomplete/autocomplete_edit_view_mac.h
index ff394de15fec81cca40360c6bcd45a508c161cc8..e8d00fbf477f1aba6a1f92b5de32ae076c43590c 100644
--- a/chrome/browser/autocomplete/autocomplete_edit_view_mac.h
+++ b/chrome/browser/autocomplete/autocomplete_edit_view_mac.h
@@ -80,9 +80,11 @@ class AutocompleteEditViewMac : public AutocompleteEditView {
   virtual void OnBeforePossibleChange();
   virtual bool OnAfterPossibleChange();
 
-  // Helper functions which forward to our private: model_.
+  // Helper functions which forward to |model_|, for use from
+  // AutocompleteEditHelper Objective-C class.
   void OnUpOrDownKeyPressed(bool up, bool by_page);
   void OnEscapeKeyPressed();
+  // Only forwards to |model_| if the field_ has focus.
   void OnSetFocus(bool f);
   void OnKillFocus();
   void AcceptInput(WindowOpenDisposition disposition, bool for_drop);